éloquence 150i Stands-Up to Scrutiny

éloquence 150i Integrated Amplifier FrontHi fi audio amplifier and electronics repair facility, Audio Specialty Co. of Hudson NH, recently conducted a series of tests on our éloquence 150i Integrated Amplifier.

The éloquence 150i "is very impressive" and "it's technical performance is practically indistinguishable from perfection", comments David Plummer, proprietor of Audio Specialty Co. "It's noise floor, and distortion (THD and IM) levels are among the lowest (best) that I have ever measured."

Of course we were extremely chuffed to hear David's comments and it's very pleasing to see third-party tests reflect our own in-house test results. We try our best to test in real-world conditions and provide real-world specifications, so it was very reassuring to see David's tests show similar results – even though they were conducted using entirely different test equipment.

David's tests were conducted using RightMark Audio Analyzer 5.5 test software, running on a PC using a Echo Audio Mia sound card. His results are included below for your reference.


RightMark Audio Analyzer Test

Testing chain: Input 3 to Main out
Sampling mode: 24-bit, 96 kHz
Serial number: 841626

Amp clips at 220 watts/channel into 8 Ohms at 1kHz with no thermal pre-conditioning, both channels driven.


Frequency response (from 40 Hz to 15 kHz), dB: +0.07, -0.12 Very good
Noise level, dB (A): -92.9 Very good
Dynamic range, dB (A): 91.1 Very good
THD, %: 0.0014 Excellent
IMD + Noise, %: 0.0089 Very good
Stereo crosstalk, dB: -84.6 Very good
IMD at 10 kHz, %: 0.0092< Very good

General performance: Very good

Frequency Response

éloquence 150i Integrated Amplifier Frequency Response

Frequency range Response
From 20 Hz to 20 kHz, dB -0.17, +0.07
From 40 Hz to 15 kHz, dB -0.12, +0.07

Noise Level

éloquence 150i Integrated Amplifier Noise

Parameter Left Right
RMS power, dB: -89.7 -90.3
RMS power (A-weighted), dB: -91.2 -92.9
Peak level, dB FS: -73.0 -71.3
DC offset, %: -0.00 -0.00

Dynamic Range

éloquence 150i Integrated Amplifier Dynamics

Parameter Left Right
Dynamic range, dB: +89.7 +90.5
Dynamic range (A-weighted), dB: +91.1 +93.2
DC offset, %: -0.00 0.00

THD + Noise (at -3 dB FS)

éloquence 150i Integrated Amplifier THD+N

Parameter Left Right
THD, %: 0.0019 0.0014
THD + Noise, %: 0.0094 0.0082
THD + Noise (A-weighted), %: 0.0079 0.0064

Intermodulation Distortion (IMD)

éloquence 150i Integrated Amplifier IMD

Parameter Left Right
IMD + Noise, %: 0.0099 0.0089
IMD + Noise (A-weighted), %: 0.0093 0.0080

Stereo Crosstalk

éloquence 150i Integrated Amplifier Crosstalk

Parameter L <- R L -> R
Crosstalk at 100 Hz, dB: -82 -80
Crosstalk at 1 kHz, dB: -81 -84
Crosstalk at 10 kHz, dB: -62 -66

Intermodulation Distortion (swept tones)

éloquence 150i Integrated Amplifier IMD Sweep

Parameter Left Right
IMD + Noise at 5 kHz, %: 0.0099 0.0093
IMD + Noise at 10 kHz, %: 0.0103 0.0091
IMD + Noise at 15 kHz, %: 0.0105 0.0092


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