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K-Bob's K-Bob's main system System
IP Address: Last Update: April 18, 2019 at 10:53:00
Amplifier: Main Amp:
B&K ST-2020
w/ PS Audio Plasma power cord

power = 125wpc rms @ 8 ohms
dyn pwr = 185w @ 8 ohms
peak current = 36 amps
dynamic headroom = 1.5 dB
damping factor = 180
THD and TIM = .09%
S/N = 95dB
weight = 30 lbs

Sub Amp:
Sonance Sonamp 260 MKII

power = 100wpc rms @ 4 ohms
dyn pwr = 125w @ 4 ohms
THD = .09%
TIM = .01%
S/N = 100dB
Preamplifier (or None if Integrated): Rotel RC-970BX

homemade passive pre for sub volume control

Behringer DSP 1124P
12 band digital parametric EQ

Harrison Labs FMOD passive hi-pass filters

Harrison Labs PFMOD LP-1 passive low pass filters
Speakers: Mains:
Monitor Audio Bronze 2
on sand-filled Target stands

two (stereo) 8" Boston Acoustics Micro 90pv
converted to passive

Subs low-passed at 42Hz (18dB/octave slope),
then equalized by Behringer DSP 1124P

Mains running full-range with no EQ,
but protected by 30Hz hi-pass filters
(-3dB at 29Hz, 12dB/octave slope)

Approximate measured in-room freq response:
27-20 +- 10dB, w/totally flat bass down to 28Hz
but sharp drop to 0dB below 27Hz
(literally, it's like a cliff to nothing)
CD Player/DAC: NAD C542 CD player
Turntable/Phono Stage: Pro-ject Debut Carbon DC

Ortofon 2M Red cartridge

TC-750 phono stage
w/upgraded power supply
Other Source(s): Harmon Kardon TD302 cassette deck

Yamaha TX-492 tuner
w/ Radio Shack tri-drive yagi antenna
w/ RCA signal booster

Gateway laptop for digital and streaming
w/ Fiio E10K Olympus 2 USB DAC
bit-exact streaming using Foobar2000
Other Accessories/Room/Misc.:
Speaker Cables/Interconnects: Speaker Cable =
bi-wiring mains with unterminated
Monster Standard S16-4R 16ga bi-wire


preamp to main pwr = XLO/VDO ER-5 (.5m)

preamp headphone out to sub xovers =
Monoprice premium coax 3.5mm (6')
w/ Radio Shack 90 degree 1/4" to 1/8" adapter

bass xovers to EQ = Stinger 1000 (.5m)

EQ to sub volume control = Mogami 2534

sub volume control to sub amp =
WireWorld Solstice II (.5m)

CD to preamp = WireWorld Orbit III+ (.5m)

USB DAC to preamp = SKW

tuner to preamp = generic (NAD OEM)

turntable to phono amp = Pro-ject OEM
phono amp to preamp = WireWorld Solstice 7

tapedeck = Radio Shack Gold Series
Other (Power Conditioner, Racks etc.): Tripp Lite Isobar 12

StudioTech HF Series 5 shelf rack
Tweaks: 1. Dedicated 20A circuit with 10ga wiring and hospital grade outlet.

2. Damping Tac all over phono preamp.

3. Damping Tac on amplifier fins.

4. Flagstone isolation platform for turntable.

5. Speakers bungie-corded to stands.

6. Subwoofer amp being driven by headphone output of preamp (2nd pre-out is driving zone amp in kitchen). Sub seems to have more punch this way.

Room Size (LxWxH): 16 x 15 x 10
Room Comments/Treatments: Old house with wood floors and high ceilings.
Entire end wall where speakers are is a bay window.
Two walls have large thruways, so room is actually fairly open.
12' from speakers to main listening position.
Music Preferences and Comments:
Music Used (Genre/Selections): '80's rock (INXS, U2, Cure, etc.)

techno (Chemical Brothers, Infected Mushroom)


jazz (Bluesiana, kd lang)
System Goals/Comments: This system sounds quite good and is just about perfect for the size room it is in.
System Strengths: 1) sounds very good, especially realistic on vocal, folk, and jazz music

2) Value. The complete system was around $3600.
System Weaknesses: 1) could be more convincing on full scale classical music

2) limited absolute maximum volume and impact.

3) imaging isn't the best--mostly due to speaker placement and seating position, I think.
Video/HT System: None
URL Link: http://www.flickr.com/photos/kparris1970/sets/72157601602884755/

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