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K1000 Amp Survey - Page 2

post #16 of 92
Quote:
Originally Posted by joelongwood
K1000 + AudioValve RKV MKII = Sonic Bliss (to my ears, of course)

Can't agree more. RKV + K1000 = Yum!
post #17 of 92
To me they sucked with everything i tried except stuart's conrad johnson CAV-50.
post #18 of 92
I cant wait to get my K1000s and try them with a t-amp. Hopefully everything will run smoothly.
post #19 of 92
Quote:
Originally Posted by null
I cant wait to get my K1000s and try them with a t-amp. Hopefully everything will run smoothly.
It's sound with the t-amp is essentially the same as it sounds with a >$1K ASL AQ-1005DT 300B tube amp. With both of these amps it sounds outstanding. So, people can feel confident going with the cheap (i.e, ca. $25 amp.).
post #20 of 92
[QUOTE=MichaelFranks]Prehead is very accurate but puts out a little less volume than I would like.

I absolutely agree: very high resolution throughout the complete frequency-range, tight focussed bass - but not enough punch to be convincing. So I still prefer the Kenwood L1000C Pre- and Parasound 2200 power-amp for driving the K1000. Less resolution but great bass and very dynamic.
(I use the Prehead for UE10: that is the absolute dream-team).
Greetings from Germany
post #21 of 92
Melos SHA-1 turns out to be a very good K-1000 amp. RKV is in its element with K-1000, and Fisher 400 is amazingly good. EAR HP4 is another excellent K-1000 amp. Right now, my modded Melos is the amp I use. I've turned the Fisher into a nice little speaker setup, and don't like changing the connectors a lot.
post #22 of 92
Quote:
Originally Posted by Hirsch
Melos SHA-1 turns out to be a very good K-1000 amp. RKV is in its element with K-1000, and Fisher 400 is amazingly good. EAR HP4 is another excellent K-1000 amp. Right now, my modded Melos is the amp I use. I've turned the Fisher into a nice little speaker setup, and don't like changing the connectors a lot.
RKV MkII is a great amp with the K1Ks. Very punchy and good detail. Better for rock than the Cary 2A3i (with Sovtek 2A3s, Sylvania chrome dome 6SN7s, Tesla Ecc802s) integrated. The Cary has what you would expect, great midrange and very good detail, never fatiguing, excellent with vocal and acoustic music. Runs in Class A so it can really warm up your room, if space is tight. And it makes the little hamsters in your electric meter run around in circles all the time (although it does have a standby mode).
post #23 of 92
Thread Starter 

decision made

I started this thread cause I was jonesing for a new toy, and I thought an amp might be a good idea.

After much deliberation I decided instead to modify my existing amp, and purchase a new source. My amp is an ASL MG Head OTL/32. I believe that the OTL/32 is an exceptional value. I have ordered some HAL-O tube dampers and I think that I’ll rewire it with some Siltech wire. Maybe I’ll find a higher-grade potentiometer to install.

The new source I’ll discuss in the source forum.
post #24 of 92
K1000 are the AKG "earspeakers" correct? I would guess that some type of impedence matchin would have to be performed for these to workf correctly with a standard headphone amplifer. Are these amplifiers mentioned matched in this manner or are some of the loudspeaker amplifiers? Excuse my ignorance on the matter. I have these available to me for use and have never put them to any good. If possible I would love to find an application for them.
post #25 of 92
Quote:
Originally Posted by edisonmach
K1000 are the AKG "earspeakers" correct? I would guess that some type of impedence matchin would have to be performed for these to workf correctly with a standard headphone amplifer. Are these amplifiers mentioned matched in this manner or are some of the loudspeaker amplifiers? Excuse my ignorance on the matter. I have these available to me for use and have never put them to any good. If possible I would love to find an application for them.
It's not a question of impedance, so much as power. Typical headphone impedances range from 32 ohms to 300 ohms, so the K-1000's 120 ohm impendance is right in the ballpark. However, the K-1000 is very inefficient compared to most headphones, and normally requires a speaker amp rated at 7-10 watts to drive them. However, that rating is normally into 8 ohms or so, so the real output needed would be the wattage of the same amp into 120 ohms, which is a bit less. Some headphone amps have enough power to drive the K-1000 (but fewer will drive it well). There are some good suggestions in this thread.
post #26 of 92
Quote:
Originally Posted by edisonmach
K1000 are the AKG "earspeakers" correct? I would guess that some type of impedence matchin would have to be performed for these to workf correctly with a standard headphone amplifer. Are these amplifiers mentioned matched in this manner or are some of the loudspeaker amplifiers? Excuse my ignorance on the matter. I have these available to me for use and have never put them to any good. If possible I would love to find an application for them.
Not so much impedance matching. You'd need enough voltage swing from the amplifier.
For a headphones amplifier, you're more limited by current output than voltage swing.
It's more of the other way around for speaker amplifiers.

For speakers with their low impedances, you need a lot of current but less voltage swing.
Consider this:
To put 0.4 watts into a 4 ohm load (speaker), you only need ~1.26v but ~0.32A. This means the speaker amp can get away with a 3v swing as long as it can output the current required.
However, to put 0.4 watts into a 120 ohm load (K1000), you'd need ~7v but only ~0.058A.
Pushing 7v into a 4 ohm load, you'll need to output 12.25w. So you can't just use a low power speaker amp to drive the K1000's, it's less likely to have to voltage swing to drive them.

Similarly, a headphone amp using opamps may be able to give you a voltage swing of 18v p-p (24v supply & 3v off each rail for the opamp) but the opamps can only give about 0.045mA (for the higher end Burr Browns and AD chips). The voltage swing is enough to drive a pair of K1000's but the current output is still not sufficient to do so. You got to be pretty crazy to push opamps to output that kind of current levels anyway.

edit: semantic error
post #27 of 92
Hi,

i'm sorry to be a little bit out of subject, but i'm scared when i think that my gift for christmas could not work with my amp
I would use the K1000 with my hybrid Mosfet & tubes amp. It's an Kora Explorer 90 SI ( http://www.kora.net ) . Here is some technical details from audioXpress.com :
Power Output: 61W 8 ohms 1% THD
Output impedance: 0.69 ohms at 1Khz and 0.71 ohms at 20 Khz

Is it enough to drive the K1000 ?
I like the sound of my amp. It give an warm and rounded sound.
post #28 of 92
Thread Starter 
Your amp should drive them. Whether it will sound good is the other question. I bet that it'll work fairly well.

Good Luck.
post #29 of 92
Quote:
Originally Posted by Hirsch
I've turned the Fisher into a nice little speaker setup, and don't like changing the connectors a lot.
I had a local tech add some bananna plugs in parallel with the speaker outs, so I can use either or both with ease!
post #30 of 92
I have tried driving K1000 with T-amp (powered by a large sealed lead battry), and found it a bit too bright and thin. However, the level of details is quite astounding.

Then I tried a Jolida JD301 with K1000, which is a bit counterintuitive because JD301 is a hybrid integrated amp (12AX7+MOSFET OP-amp). This combo sounds a bit less detailed than T-amp, but smoother and more relaxed. I ended up using only Jolida for K1000 but the T-amp works beautifully with my speakers.

Next I would like to try a tube amp with K1000, any suggestions?
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