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[Mr John DEUFF]

This amp seems to be amazing.
@ Rayson56: you have it installed with the HK unit or another one?
No one have a video of it "in action"?!

[rayson56]

HK head unit and 4 Hertz 6.5s

[Mr John DEUFF]

And with the new amp you don't use the HK amp anymore?

[rayson56]

The new amp replaces the boom audio (mtx) amp. HK head unit (radio) + Biketronics amp + speakers of your choice = amazing!

[TIF2]

Just keep in mind that you can't tune this amp for different speaker sensitivity (no gain adjustment).
I hear that the ability is coming, but as far as I know ... it can't be done on this version.

[TIF2]

180w x 4ch @ 4 Ohm.  Says 2 Ohm capable, but no spec's? Also, what are those small boxes that they show in the kit?  Cross overs??

Hey Scott -

Those are low-level converters.
Takes speaker-level outputs from a head unit and converts them to low-level (or pre-amp) outputs.

[FAST380]

This Biketronics amp about makes your ears bleed at 1/2 volume! I had to turn the AVC down to 1 bar.

Just keep in mind that you can't tune this amp for different speaker sensitivity (no gain adjustment).
I hear that the ability is coming, but as far as I know ... it can't be done on this version.

No gain control is an issue and explains why it makes your ears bleed at 1/2 volume. Are you using the high to low level adapters? They don't have a gain adjustment on them either?

[mrmagloo]

Hey Scott -

Those are low-level converters.
Takes speaker-level outputs from a head unit and converts them to low-level (or pre-amp) outputs.

Ah, thanks!

[rayson56]

No gain control is an issue and explains why it makes your ears bleed at 1/2 volume. Are you using the high to low level adapters? They don't have a gain adjustment on them either?

The ear bleeding analogy was a positive tongue in cheek thing. Yes the low level adapters are being used. I'm compensating for the lack of gain adjustment by adjusting the tone levels on the head unit. Bass up a bit and treble down a bit. While not perfect for the ultimate enclosed listening environment, this thing sure kicks butt going down the road. I especially like being able to adjust the fader control (going from a 2 channel to a 4 channel system) by adding a little extra to the lowers to even things out.

[TIF2]

The ear bleeding analogy was a positive tongue in cheek thing. Yes the low level adapters are being used. I'm compensating for the lack of gain adjustment by adjusting the tone levels on the head unit. Bass up a bit and treble down a bit. While not perfect for the ultimate enclosed listening environment, this thing sure kicks butt going down the road. I especially like being able to adjust the fader control by adding a little extra to the lowers to even things out.

The gain adjustment (or - lack thereof) becomes an issue if you are using speakers with different sensitivity ratings.
Adjusting tone controls can't compensate for that.

For example, if you have speaker A in the fairing, rated at say 92dB (1w/1m) - and you have speaker B in the lowers, rated at say 89dB (1w/1m) ....
The only way to balance the output between the speakers is via gain on the amp. In the above example, the speakers in the fairing will sound twice as loud (well, nearlly) as the speakers in the lowers.

No amout of tone adjustment will change that. If the lowers are hooked to the rear amp, then you COULD use fade control to balance things, but it is always most desirable to have that adjustment via gain on the amp.

Not saying it's a deal-breaker for this amp - justy pointing out the fact these amps lack gain adjustment.
It's something to consider before purchase.

[Mr John DEUFF]

@ TIF2: so if I buy this kind of amp I need to put the same speakers? The thing strange about this amp is that the power is twice more powerfull than all the other amps, how can they do that?

[rayson56]

The gain adjustment (or - lack thereof) becomes an issue if you are using speakers with different sensitivity ratings.
Adjusting tone controls can't compensate for that.

For example, if you have speaker A in the fairing, rated at say 92dB (1w/1m) - and you have speaker B in the lowers, rated at say 89dB (1w/1m) ....
The only way to balance the output between the speakers is via gain on the amp. In the above example, the speakers in the fairing will sound twice as loud (well, nearlly) as the speakers in the lowers.

No amout of tone adjustment will change that. If the lowers are hooked to the rear amp, then you COULD use fade control to balance things, but it is always most desirable to have that adjustment via gain on the amp.

Not saying it's a deal-breaker for this amp - justy pointing out the fact these amps lack gain adjustment.
It's something to consider before purchase.

Great info and thanks, especially for those out there not able or not choosing to run the same speakers all around, but in my case I do have the same speakers uppers and lowers, Hertz 6.5s.

TIF2 you are and have been a wealth of information on this site. Thanks again and keep up the good work.

[TIF2]

@ TIF2: so if I buy this kind of amp I need to put the same speakers? The thing strange about this amp is that the power is twice more powerfull than all the other amps, how can they do that?

Yes ... it would be ideal to get matched speakers, with the same sensitivity rating.
You don't NEED to, but the system would sound more "balanced" if you did.

[Mr John DEUFF]

Thank you!