Specifications Specifications Inputs: 1- Balanced XLR, 1- Balanced ¼” TRS Frequency Response (-3 dB): 46 Hz - 20 kHz Frequency Response (-10 dB): 38 Hz - 23 kHz Crossover Frequency: 2.4 kHz LF Amplifier Power: 90W RMS @ 4 Ohm HF Amplifier Power: 90W RMS @ 4 Ohm Continuous SPL (@ 1 meter): 102 dB Peak SPL (@ 1 meter): 116 dB LF Driver: 8” glass-reinforced paper HF Driver: 1” diaphragm compression driver Input Impedance: 10 kOhm Volume Range: A-type taper HF Control: Flat, +1, -1.5, -4 dB Low Cut: Flat, 60, 80 Hz, 100 Hz Acoustic Space: Flat, -1.5, -3, -6 dB Protection: RF interference, Over-current, Over-voltage, Over-temperature, Turn-on/off transient, Subsonic filter, External mains fuse Power: 100-120V ~50/60 Hz or 220-240V ~50/60 Hz Cabinet: Vinyl-laminated, medium-density fiberboard Width: 11.4” (290 mm) Depth: 13.3” (338 mm) Height: 15.75” (400 mm) Weight: 24.25 lbs (11 kg) Measurements
S8 at ¼ m, average of six measurements. Matching between the two S8 that I reviewed was exceptional, with a small area of opportunity for improvement between 8 and 10 kHz, which did not draw attention to itself during the evaluation. While soundstage & imaging (SS&I) were polished and tightened with the application of Dirac Live, the unequalized imaging was first rate, with no instability or smearing to distract the listening experience.
Normalized measurements of the variations available for acoustical space tuning, HP filtering, and HF driver contribution.
HF response at off-axis angles shows little degradation out to beyond 30deg off-axis. In a home theater setting, one should always favor main listening position (LP), remembering that it is rare that more than one person who really cares about sound is in the room at the same time.
Frequency Response at the LP using the Moving Mic Measurement (MMM) method. Dirac Live room correction is engaged.
Distortion measured at Dolby Reference Level was very low, below 0.8% up to 150 Hz, below 0.2% from there up to 700 Hz, peaking at 0.5% at 900 Hz, back down below 0.2% from 1 kHz to 5 kHz, and up to only 0.32% at 7 kHz.
The impulse response, with its quick return to zero, indicates a very fast design in the compression tweeter. There was every indication in listening that the S8 could keep up with the most complex material I could feed it.
Step response shows slight underdamping, allowing quick response near the resonance point of the 8-inch woofer. There was no audible ringing.
Group Delay indicates a mere 4 mS delay through the mid and high frequencies.
Measurement Methods Asus G74SX Laptop, Intel I7-2670QM @ 2.2 GHz, 16 GB DDR3 Memory, Windows 7 64-bit, Room EQ Wizard, foobar2000, Reaper DAW Digital Audio Workstation, Phenom II x6 1100t @ 3.5 GHz, 16 GB DDR2 Memory, AMD Radeon HD 6670 Graphics & HDMI Media by Sapphire, Windows 7 64-bit, Room EQ Wizard, foobar2000, Reaper DAW Digital Media Server, Phenom II x6 1055t @ 2.8 GHz, 8 GB DDR2 Memory, AMD Radeon HD 6450 Graphics & HDMI Media by Asus, Windows 7 64-bit, Room EQ Wizard, foobar2000, Reaper DAW Audioengine D1 Premium 24-bit DAC, Courtesy Audioengine Roland Quad-Capture Audio Interface M-Audio Fast Track C600 Audio Interface M-Audio Firewire 410 Audio Interface miniDSP nanoAVR DL HDMI Audio Processor with Dirac Live, Courtesy miniDSP, Home Theater Shack Sponsor Beyerdynamic MM1 Measurement Microphone miniDSP UMIK-1 Measurement Microphone, Courtesy miniDSP, Home Theater Shack Sponsor American Recorder SPL-8810 Sound Level Meter OPPO HA-1 DAC/Headphone Amplifier, Courtesy OPPO, Home Theater Shack Sponsor Onkyo TX-SR705 Receiver Emotiva Pro Airmotiv 4 Powered Studio Monitors MartinLogan ESL Hybrid Electrostatic Loudspeakers NSM Audio Model 5 Compact 2-Way Loudspeakers Polk Audio PSW10 10-inch Powered Subwoofer Bosch DLR130 Laser Distance Measurer Fluke 77 Multimeter P3 P4400 Kill-A-Watt Electricity Usage Monitor CyberPower PP1100SW Sinewave UPS
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