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Discussion Starter · #1 ·
Hi there


I was wondering if anyone could about some info about speakers and amp compatibility?


The speaker spec goes like this


speakers 902i

Sensitivity 89db

Frequency response 55Hz - 22Hz

Impedance 4 - 8

Drive units 1 x 130 (5.25") aluminium CPC mid/bass driver 1 x 125 (1") aluminium dome tweeter

Crossover 1st order with DVP HF

Recommended amplifier power 15 - 100 watts

Magnetic shielding yes

speaker (H x W x D) 290 x 165 x 265mm (11.4 x 6.5 x 10.4")

Weight 5kg (11lbs)


speakers 905i

Sensitivity 90db

Frequency response 60Hz - 22Hz

Impedance 4 - 8

Drive units 2 x 130 (5.25") aluminium CPC mid/bass driver 1 x 125 (1") aluminium dome tweeter

Crossover 1st order with DVP HF

Recommended amplifier power 15 - 120 watts

Magnetic shielding yes

speaker (H x W x D) 165 x 485 x 200mm (6.5 x 19.1 x 7.8")

Weight 7.5kg (16.5lbs)


TEAC AG-10D amp

Amplifier Section Output Power (Stereo, 0.2 % THD, 20 Hz to 20 kHz, 6 &) 100 W + 100 W

Surround Output Power (0.7 % THD, 1 kHz, 6 &, only one channel driven) . . . . . . . . . . . . . . . . . . . . . . . . . 125 W per channel


Total Harmonic Distortion. . . . . . . . . 0.09 % (at 95 W, 1 kHz, 6 &)


Audio Input Sensitivity/Impedance. . . . . . . *LINE: 200 mV/47 k&


Output Level/Impedance (TAPE REC) . . . . . . . . . 200 mV / 2.2 k&


Frequency Response . . . . . . . . *LINE: 20 Hz - 50 kHz, +0 / -3 dB


Signal-to-Noise Ratio. . . . . . . . . . . . . . . . . . . *LINE: 90 dB (IHF-A)


Tone Control . . . . . . . . . . . . . . . . . . . . . . . BASS: ± 10 dB at 100 Hz

TREBLE: ± 10 dB at 10 kHz



Digital Audio Section

Sampling Frequency . . . . . . . . . . 32 kHz, 44.1 kHz, 48 kHz, 96 kHz


Digital Input Level . . . . . . . . . . . . . . . . . . COAXIAL(75 &): 0.5 Vp-p OPTICAL(660nm): -15 dBm to -21 dBm


I am not sure what all the spec means and there is one I am defiantly not sure about, is the speaker Ohms 4-8 OK for amp at 6 Ohms? Does the speakers range from 4-8 covering the 6 Ohms? Not sure how the Ohms work.


Also could anyone tell me if the amp is compatible with the speakers in general?


thanks for any help
 

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Yes, those speakers are compatible with that amp.


Speakers typically have an impedance rating that they are "4 ohm" or "8 ohm" or whatever, but almost all speakers have different impedance at different frequencies. For example, look at the first graph on this page, which is a graph of impedance vs. frequency for the Magico Q5 speakers:
http://stereophile.com/content/magic...r-measurements


Your speakers have a specified rating of "4 - 8 ohms", which is a bit odd, but I suspect the manufacturer is just trying to say "these speakers work with amps that can handle 4 or 8 ohm speakers".


Pretty much all home electronic amps work fine with 8 ohm speakers. Some amps also work with 4 ohm speakers, and some even work with 2 ohm speakers. Some amps, like your amp, are rated at 6 ohms, which typically inflates the power rating a bit -- the same amp will deliver more power into 6 ohm speakers than it would into 8 ohm speakers, so the amp manufacturer specifies the power rating into 6 ohms to make it sound more powerful than if they posted the power rating into 8 ohms. For example, look at the last chart on the following page, which shows a beefy amp that will deliver 365.1 watts into 8 ohms and 669.8 watts into 4 ohms:
http://stereophile.com/content/krell...r-measurements


This stuff can be a bit tricky to understand, but the bottom line is that your speakers will work fine with your amp.


-Max
 

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Discussion Starter · #4 ·
Thank you for maxcooper for the reply

The links are very useful, but I have not read them properly yet, need to spend some time on them as I am not very technically minded. But its good to know the speakers are OK with this amp.

Thanks again
 
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