Voice Kraft Loudspeakers: Upgrade Tips for Models VK 7615 & VK 3188, Amplifier Akai AM-47

Hello to all owners of Voice Kraft loudspeakers, please give feedback on the models they own.

Many people have been tempted by the ridiculously low prices of these products. Many people think that they sound bad ... It turns out, however, that it is enough to rework the loudspeakers a little and they sound much better then ... I am the owner of the VK 7615 model on the Akai am-47 amplifier



The first thing I did was replace the wiring inside the loudspeaker. By default, for all loudspeakers, including the woofer, I use cables with a cross-section of less than 0.5 mm, as if from Chinese Christmas tree lights (very weak low bass ... even its lack, and we have 2 speakers, 20 cm each), after replacing the cables with 1.5 mm speakers sounded much lower.

2.very poor crossover. For bass 1 coil and after a capacitor for high and mid-woofers. I bought 3-way VK 3188 crossovers with 12db / oct declines so that each loudspeaker sounds in its own range and even with a loud bass there is not as much distortion as with the factory '' crossover '' He is still experimenting with the frequency of the partitions.

3. lack of damping inside the namet of a piece of sponge ... (the columns rumbled) lined all the walls with a sponge 5 cm thick.

4. lack of column sealing (gaps between the bass-reflex and peripheral tunnels, clamps and loudspeakers and peripheral)

Please, give me your suggestions and opinions about other Voice Kraft models.

Please correct the mistakes in the post.
(dj-MatyAS)

One disturbing thing catches my eye. By connecting the woofers in parallel instead of in series, you get four times lower impedance in this section, which makes any calculations (of the manufacturer of the crossover or the entire loudspeaker) for the crossover part of the subwoofer sound pointless, i.e. there is probably a hole in the band and some frequencies may be less audible because The crossover cuts lower.
I am an amateur in this field, but it seems to be the case.

PS. I do not mention the four times more loaded elements in the crossover. Will it hold on?

... so far it can withstand it, now there is bass even when listening quietly. Don't expect miracles from loudspeakers for PLN 350 a pair.

jjanusz89 wrote:

come on, what can it hold. now there is bass even when listening quietly. do not expect miracles from loudspeakers for PLN 350 a pair.

If you do not have high requirements, you can go ahead and buy it.
vK is the same scapegoat as alphard. People who have absolutely nothing to do with them give opinions on them. If you have to pack old, regenerated altuses, you can buy these vk.

Moderated By dj-MatyAS:

What does Kolegi's post have to do with the topic?
Writing to write ...
That is...
Regulations p. 10.4
Warning No. 5

Zapek, have you even read what this topic is about?

I was tempted by the price and I am satisfied. just a few modifications and the loudspeakers were `` unlocked '' and they sound great. For less than PLN 400 I have new, large, nicely made housings and as many as 8 speakers, I prefer it than some used altuses. for this price it simply pays off.

LOL, I have altus 75 and 2 under 45 in walking! And you are leaving me here with Chinese crap. I just feel sorry for you.

PS. Altus works under some akira :D


Regulations 10.8
You may receive a reprimand for a similar tone of statements in this forum.
(dj-MatyAS)

qlimax wrote:

LOL, I have altus 75 and 2 under 45 in walking! And you are leaving me here with Chinese crap. I just feel sorry for you.

PS. Altus works under some akira

My brother also has a VK model 7830 and I will say that they sound really nice for this money, the fact that he mentioned the tweeters that sounded hopeless or rather did not sound, but now they sound good, if instead of crap ampli KD Pionera 516 he had a hint, it would be a grazer :P

My friend from this Tonsil, I am not saying that your loudspeakers sound better or worse, but if YOU haven't heard others, please don't take the floor !! I was listening, and even had altuses a long time ago, so I have a comparison of these loudspeakers ...

I have nothing to do with altus, but if the altus is only 140, it is still a relic, we are talking about new speakers here ...

jjanusz89 wrote:

Unfortunately, on the individual speakers there is not even information about resistance, know you have to guess that they are 4 ohm speakers. HOWEVER, AFTER CONNECTING THE PARALLEL AMPLIFIER STANDS CALM AND NOTHING WILL HAPPEN AND THE BASS IS SO MUCH THAT THE WALL CAN MOVE It would seem that the loudspeaker is like 2 ohms, but that the amplifier works without a problem (I have already had a month and I listen to loud a lot) so I guess that the speakers have not 4 but 8 ohms, which means that in the parallel we have a 4 ohm speaker. to the fact that the factory two 8 ohm speakers are in series, which gives 16 ohms and little bass for 2 speakers of 20 cm. I do not have an ohmmeter, now everything would be clear. Kraft.

If you have no idea about something, it's best not to do it. The fact that the amplifier is still working is nothing but your luck. Because if it turns out that the speakers have 4 ohms and you connected them in parallel, which I give 2ohms, you can be sure that it will not sound like that for a long time. I consider the topic pointless and your advice on how to improve the sound of these columns is harmful to other forum members.

except the last point, what's harmful ??

I also do not see anything harmful here except the last point. If the boy wants to, let him correct the producer. Some people don't remember how they tuned their little ones by adding stickers (+ 2KM) and bucket diameter exhaust pipes (another 5KM) and want to criticize others. Please do not be offended for my comparison, because I did not mean anyone in particular A salute to a friend, because he is not afraid of being criticized by players on the audio scene.

Added after 3 [minutes]:

I also used to modify the loudspeakers from the Aiwa tower (adding soundproofing, changing the cables) completely not knowing about it and not really believing if I improved anything. Self satisfaction - priceless !!!

I had the Vk loudspeakers a few years ago, but I don't remember the model, the ones with white diaphragms and a woofer on the side, at least it was a tragedy - they were made of some plywood or even felt, so when I moved one and hit it, a hole was normally formed. Of course, zero attenuation, a 3-element crossover, after some time one tweeter started farting and as it turned out a magnet in one speaker came off

Hello. I am thinking of buying an amplifier and speakers. It is true that I mainly listen to music, but if it was a 5.1 set it would not be too bad either. I was wondering about the VK 7830. I read quite a lot of opinions about them - some that they are relative in particular to their price, and others that they are a crap that is rare in the world.

However, one thing puzzles me, why nobody sells these loudspeakers used on the Allegro (generally VK stimulants are rarely seen on the Allegro). Is it because they break (but if they do, they would even display damaged ones on the Allegro), or are their users simply so delighted with them that they do not intend to change them for the better?

And now my question: is it better to buy 2 good audio speakers (what?) Or this VK 7830 set? (price up to PLN 1000)

And what amplifier should I buy for it? (It can be used up to PLN 500)

room about 30 m2, the type of music is mainly 90% trance and house, a bit of rock, sometimes some pop, from time to time classical music.

franec1 wrote:

And now my question: is it better to buy 2 good audio speakers (what?) Or this VK 7830 set? (price up to PLN 1000)

https://www.elektroda.pl/rtvforum/topic1043839.html

A very good tutorial.
And if you could give some specific names (kit) amplifier and good speakers - stereo (can be used), and a 5.1 amplifier + speakers kit (can also be used). It is true that I would rather add new speakers, but the amplifier may be a bit expensive.

"So do they have to buy separate music equipment with separate speakers? Not necessarily. A good solution in this case is to buy a KD receiver with pre-out output"

I would like to ask for a specific name of the receiver.

What do you think about this receiver? http://allegro.pl/item965701166_amplituner_5_1_panasonic_sa_he75_2x_optyczne_coax.html

Some time ago I bought these crap loudspeakers model 1004 with the assumption that if it really turns out to be a complete failure, they will be reworked, after all, the speakers themselves cannot be so cheesy that they sound badly. First impression - rumbling bass, rest (medium and high tones reasonably ok). After looking inside, I broke down - shoddy workmanship, thin wires, one capacitor per whistle, no soundproofing, no tightness (hence the weak bass) really with this type of loudspeakers, they generally sound good After soundproofing with a sponge, sealing and changing the wires inside to 2.5mm, the bass is much better sounded lower I am still thinking about applying a crossover to them, I will write what came out of it ...

I am an undemanding music lover. I have a set of VK 1004 loudspeakers and an active VK 880 subwoofer. I have replaced the equipment for well over a year. I am very happy with VK. The sound is clean, strong [thanks to the sub] and clear. I do not understand those who advise to buy used equipment of good brands. I do not know why buy some old crumbling eyelashes in which almost everything can be replaced and as a result pay for it several times as much as for VK.

Only that good older equipment can "last" over 20 years and these VKs will start to crumble after 5 years.
Especially cheap, poor quality components, such as speakers.

ARCAM TEAM wrote:

Only that good older equipment can "last" over 20 years and these VKs will start to crumble after 5 years.
Especially cheap, poor quality components, such as speakers.

Clairvoyant? How do you know that he is falling asleep in 5 years? have you ever had something from Voice Kraft?

I changed a few Voice Kraft sets, how it sounds decently for such money.

However, it is still Chinese and the worst thing about it is that each speaker sounds different, like 2 20 cm speakers, the same model and different parameters.

Vitu wrote:

ARCAM TEAM wrote:

Only that good older equipment can "last" over 20 years and these VKs will start to crumble after 5 years.
Especially cheap, poor quality components, such as speakers.

Clairvoyant? How do you know that he is falling asleep in 5 years? have you ever had something from Voice Kraft?

I changed a few Voice Kraft sets, how it sounds decently for such money.

However, it is still Chinese and the worst thing about it is that each speaker sounds different, like 2 20 cm speakers, the same model and different parameters.

Game decent?
Apparently you only had VK and no benchmark.

Maybe you give the costs of such modifications, because it may turn out that it is not so rosy.

In my case, the cost of converting these speakers is practically no cost I only used silicone for sealing, a 4 cm thick sponge was provided by a familiar upholsterer, although it is probably not expensive and it is about 3m of 2x2.5mm speaker cable - the cost is about PLN 5 I am thinking about a crossover, which will probably help a lot here - the cost is a bit higher depending on whether you will do it yourself or buy a ready-made one. Gotowiec is for about 20-30 zlotys, so I slowly start designing and making my own switches. Or maybe someone has already made a crossover for these speakers (VK 1004) ??

ARCAM TEAM wrote:

Vitu wrote:

ARCAM TEAM wrote:

Only that good older equipment can "last" over 20 years and these VKs will start to crumble after 5 years.
Especially cheap, poor quality components, such as speakers.

Clairvoyant? How do you know that he is falling asleep in 5 years? Have you ever had something from Voice Kraft?

I changed a few Voice Kraft sets, how it sounds decently for such money.

However, it is still Chinese and the worst thing about it is that each speaker sounds different, like 2 20 cm speakers, the same model and different parameters.

Game decent?
Apparently you only had VK and you don't have a benchmark.

You would be surprised how big my reference point is, the fact that I wrote that Voice Kraft sounds decently, it does not mean that I recommend this manufacturer's sets.

Hello. Once, at a friend's place, I was listening to Voice Kraft under the Sony receiver. VOICE KRAFT model probably VK6200 5.0 and with quieter listening well, quite well, unfortunately the tweeters died when listening louder ... If I had PLN 400, I would consider whether to invest in remaking Voice Kraft.

People sometimes do not put any money into it because it misses the point and the effects will be poor, not better to put aside a coin and buy something from the secondary market, but which plays decently and not junk those who write that these vk are not bad for this money They have not heard anything else, I think. And to those who have not bought it yet and are going to let them think about it because 99% will regret it.


Regulations p. 15
Please correct.
(dj-MatyAS)

I have a VK 986B, I made similar upgrades and they sound pretty decent

I have just had these speakers for a week, they run on the Panasonic xr25, previously I had two stx speakers and those others, although visually smaller and more delicate, sound much better. I have an old one a hint yamahy stereo and I will hook VK and STX and compare it, I will write something. I am also going to replace the cables and dampen them with a sponge because when I try to give them bass, they somehow hum that it makes me tired. I do not plan any more modifications, if it does not help, you have to look for a deer and sell it.
I'm still waiting for the sub, this time STX, we'll see how it sounds.

I don't know if anyone is reading this, but goes on to describe my thoughts.
For starters, is there anyone willing to buy the VK 7615 at a favorable price, upgraded?
I pasted one column with a 2cm sponge, the wires were thicker, the troublesome bass-hum decreased, but something else was wrong, I found that the whistle was too small, I turned the tweeter, which does not change anything, but surprisingly the clogging at the back of the inlet on quickly with a sponge with a tweeter screwed in, i.e. as if a loudspeaker without bass reflex sounds even better, how could anyone comment on it, why is this happening?
The second thing, I don't know much about electronics, but why is there such a connection in my loudspeakers: from the amplifier minus the cables to the individual speakers, from the plus amplifier to the loudspeakers through the bass coil, and after the condenser for mid and high tone. And now, from the amplifier, the minus goes to the minus bass speaker, but already to the plus of the high and mid-range loudspeaker. I do not know if I described it clearly, I would also ask for an explanation?
In general, I do not know what else to do to improve something, maybe more sponge? If someone has any ideas, he will be happy to experiment.

wojaktoja wrote:

Overall, I don't know what else to do to improve ...

Change columns.