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Double Bass Henriksen JazzAmp?

#21
Ric Vice said:
Ruben,
Heres what impresses me. "What is more important is the amp will deliver an SPL of 111 at 1khz without distortion".

Ric
Click to expand...
That sounds pretty good until you consider that a very efficient cab, such as the EA Wizzy M, only needs about 6 watts to develop an SPL of 111 dB. When driven with 60 watts, the Wizzy M would develop an SPL of 121 dB. That's quite a big difference. According to the Henriksen web site, the Jazz Amp 12 can deliver a distortion free SPL of 115 dB, which presumably is measured at the amp's max power. When a Wizzy M is driven at its rated max input of 200 watts, the SPL is 126 dB. What this means is, for the same amplifier power, the SPL will be about 10 dB higher for the Wizzy. A 10 dB higher SPL is perceived as twice as loud.
 
#22
I spoke with Mr. Henriksen, maker of the JazzAmps. He seemed like a very nice fellow and was very cordial and patiently answered my questions. The JazzAmps sound very well thought out. They use a conventional linear power amplifier, as that is his preference over class D. The EQ section has 5 bands with top and bottom at 10 KHz / 100 Hz and 3 KHz, 1 KHz, and 300 Hz in the middle. The amp is not voiced and is supposed to be flat. There is no high pass filter. The JazzAmp 12 uses a tuned bass-reflex enclosure with an Eminence Beta-12A speaker, which uses a conventional ceramic magnet. Power is about 100 watts into the internal speaker, and 160 watts with an 8-ohm extension cabinet added. The exterior coating is a sprayed-on, urethane finish called "Line-X," which is used for pickup truck beds. Overall dimensions are 14" wide x 15 ½" high x 13" deep. Weight is 29 pounds. For $674.10 with free shipping from David Gage (also available from other dealers), the JazzAmp 12 might be worth considering.
 
#25
29lbs? Adrian, get some dumb bells and do some lat rows. You just put one knee on the bench, support your weight with your left hand and use the other hand to pull up the dumb bell like you're starting a lawnmower. 3 x 20 reps each side, 3x per week. I would start with 20lbs. No wait...29lbs is the target...I would start with 10 lbs.

:D
 
#27
I have been using a Jazz Amp 12" with an URB for the past week and I like it a lot.
The thing that stands out is the EQ. It has a very warm, not overly colored (almost like a Ampeg B-15) sound and no harshness. I have not had to turn it up past 3 1/2 or 4 and it really seems strong at those volumes. The impedance match with the BP-100 is perfect, no scratchiness or tinniness at all.
The EQ is great because when boosting or cutting a frequency there does not seem to be an adverse effect on the others.
 
#32
msw said:
I have been using a Jazz Amp 12" with an URB for the past week and I like it a lot.
The thing that stands out is the EQ. It has a very warm, not overly colored (almost like a Ampeg B-15) sound and no harshness. I have not had to turn it up past 3 1/2 or 4 and it really seems strong at those volumes. The impedance match with the BP-100 is perfect, no scratchiness or tinniness at all.
The EQ is great because when boosting or cutting a frequency there does not seem to be an adverse effect on the others.
Click to expand...

Are any of the shops in Boston carrying these?
 
#36
Having used a Jazz Amp 12 for well over a month I have to say I think this is a great amp. I have used a Walter Woods 100 watt and a small cabinet with a 12" EV for the last 20 years.
I think the voicing of this amp is very natural and warm and that the eq, though not as flexible as the Woods, is nonetheless able to give me my sound in all situations (i.e. rooms, size bands and styles that I work in).
At this point I am a very satisfied customer.
 
#38
They might seem similar on paper,but I don't think they sound alike and I know the Jazz Amp has fewer bells and whistles. I have played through GKs and I liked them.There is something about the Jazz Amp though that is reminiscent of tube amps that I really like. It doesn't even approach distortion but it has a thick tone which is fat but still clear and articulate.Also I think GKs are lighter and a little smaller.
 
#39
msw said:
They might seem similar on paper,but I don't think they sound alike and I know the Jazz Amp has fewer bells and whistles. I have played through GKs and I liked them.There is something about the Jazz Amp though that is reminiscent of tube amps that I really like. It doesn't even approach distortion but it has a thick tone which is fat but still clear and articulate.Also I think GKs are lighter and a little smaller.
Click to expand...
In fact, it would seem this is the new Polytone. I'm guessing you've played thru those, any comparison with the Henrickson?
 
#40
IMO the greatest difference is that the 12" Jazzamp keeps going volumewise where the GK runs out of steam. I've only ever run mine at 25% volume control and it is strong and punchy. The sound is more rounded where the GK is a bit hard and nasally. These differences are, of course, as perceived by the player. How they sound 'out there' I'm not too sure. I still use both but increasingly the Jazzamp is finding favour.

One small disadvantage of the Jazzamp is that the DI comes out of a jack socket after the preamp stage whereas the GK DI is via an XLR socket before the preamp. This means that with the GK you get the bass signal straight to the deck, unless of course you use an outboard preamp to buffer the signal.
 

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