Which amplifier to buy?

[corobore 10+ year member]

Boston Acoustics GT-2200 vs Infinity KAPPAFOUR 125W x 4

This will run a Boston PRO60 SE

I seek an excellent amplifier With SQ

Click to read more...

 

[SplAffair 10+ year member]

Boston Acoustics GT-2200 vs Infinity KAPPAFOUR 125W x 4
This will run a Boston PRO60 SE

I seek an excellent amplifier With SQ

I absolutely love my little boston amp. the sound is amazing

 

[quackhead 10+ year member]

I vote the A/B amp.

 

[corobore 10+ year member]

is better boston than infinity?

 

[West]

The Boston amp has less THD (total harmonic distortion) .03% vs 1%

That is a spec that gives you an idea of how your amp will handle the signal from the HU. The lower the better //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Boston should have better SQ.

 

[shpatb 10+ year member]

I like boston. Do it.

 

[corobore 10+ year member]

which means these functions?

All GT models feature Boston's exclusive DualMode™ technology, which permits safe operation into speaker loads as low as 1 ohm (stereo) or 2 ohms (bridged mono), thus increasing amplifier flexibility and all models can drive subwoofers or full-range components with equal ease. The new amplifiers also feature Boston's Q-Tune™ delivering user-adjustable "Q" for each amplifier's highpass crossover filter. This provides substantial system "tweaking" power, allowing the user to enhance the bass impact from the front channels without overloading the speakers. With wide-ranging input sensitivity (to 7.5V), compatibility is extended to the widest possible range of head units, factory adaptors, and system preamps. Rounding off the feature set are adjustable 12dB/octave highpass and selectable 12/24dB/octave lowpass crossovers and for further flexibility, these can be combined for bandpass operation.

Boston Acoustics GT Line of Car Audio Amplifiers

 

[West]

which means these functions?

All GT models feature Boston's exclusive DualMode™ technology, which permits safe operation into speaker loads as low as 1 ohm (stereo) or 2 ohms (bridged mono), thus increasing amplifier flexibility and all models can drive subwoofers or full-range components with equal ease. The new amplifiers also feature Boston's Q-Tune™ delivering user-adjustable "Q" for each amplifier's highpass crossover filter. This provides substantial system "tweaking" power, allowing the user to enhance the bass impact from the front channels without overloading the speakers. With wide-ranging input sensitivity (to 7.5V), compatibility is extended to the widest possible range of head units, factory adaptors, and system preamps. Rounding off the feature set are adjustable 12dB/octave highpass and selectable 12/24dB/octave lowpass crossovers and for further flexibility, these can be combined for bandpass operation.

Boston Acoustics GT Line of Car Audio Amplifiers

High/mid range speakers and subwoofers need to receive different sound frequencies from the HU/amp. The specs you are asking about are referring to this (mostly). Filters can be applied to help select the sound frequencies that are sent to the speakers. Basically it says that you can control both the high and low frequencies sent to any set of speakers. This is a nice feature.

The ohm stability is relating to the impedance of speakers you are using. Common speaker impedance range from 1,2,4,8,and 16 omhs. Boston is claiming that the amp can handle either 1ohm and 2ohm loads and up. Generally in bridged mode amps can only handle 4ohms, but Boston is claiming that there GT line can hand 2ohms, bridged (bridged means you are running one speaker off of two separate amp channels).

The input sensitivity refers to the RCA voltage which is sent from you car receiver/HU. The normal range for modern HU's is 2-8V. Their GT line can handle up to 7.5 so basically it can work with most HU's on the market.

 

[Vertex Audio Pro Seller]

Take a look at the Zed Audio amps, very well made SQ amps

 

[imp4pdabest 10+ year member]

Boston amps are nice and produce really good SQ. I'd pick the Boston.

 

[corobore 10+ year member]

as would make the connection of the bostons PRO60 in the amp gt-2200?

 

[gozaine 10+ year member]

but is not infinity an amplifier class D and more efficient?

 

[zako 10+ year member]

The Boston amp has less THD (total harmonic distortion) .03% vs 1%That is a spec that gives you an idea of how your amp will handle the signal from the HU. The lower the better //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Boston should have better SQ.

This is non-sense. The spec is wrong. Understand that every amplifier that exists will hit and exceed 1% THD with sufficient power. The listed 1% is the THD at which RMS wattage is measured, so wattage is increased until THD hits 1% in this test. On the other hand, the THD spec is the THD you get when playing a test tone at 1watt of power. A lot of literature publishers screw up these two concepts. There is no such thing as the amplifier with 1% THD test spec.

 

[zako 10+ year member]

Why are you comparing a 4-channel amplifier and 2-channel amplifier?

Anyways. Based on what people are saying, Boston Acoustics should sound very sweet. The only issue is the size. It's 19 inch long amplifier that powers only two channels. If you can fit it comfortably somewhere, I'd say go for it. Otherwise, I would get a more compact Class D amplifier.

 

[zako 10+ year member]

but is not infinity an amplifier class D and more efficient?

Yes. Infinity is also smaller. Boston GT series do have a good reputation for good SQ.