Tang Band W8Q-1071F 8x12 woofers
I bought these several years ago with the idea I was going to make a speaker inspired by the famous TDL Reference. It turned out to be one of “those” projects, so these speakers have never been mounted. It turns out these are the holy grail in a transmission line:
https://tdldiy.files.wordpress.com/2012/08/tangband-mild-stuffing-graph.png
All specs from manufacturer data sheets:
DCR IMPEDANCE: 3.2 Ω
SENSITIVITY 1W/1m: 88 dB
FREE AIR RESONANCE：27 Hz
AIR GAP HEIGHT：8 mm
RATED POWER INPUT：250 W
FORCE FACTOR, BL：14.57 TM
MOVING MASS：134.66 g
X-max：12 mm
Vas：70.42 Litr
Qts：0.34
Qms：4.6
Qes：0.36
Full specs: https://tdldiy.files.wordpress.com/2020/08/tang-band-w8q-1071f.pdf
$60 each, $100/pr or $150 for all 4 plus shipping & PayPal
Foster NPT-11-083 10” Woofer (from NHT VT3)
These were from the famous NHT driver closeouts some years back. These have never been used, though they have been sitting up on the shelves for quite some time. I have 3 of these left. These are some of the best sealed cabinet designs around. From the high DCR, it’s clear it was meant to be used in pairs. Or perhaps all 3 in a balanced force arrangement?
DCR IMPEDANCE: 9.53 Ω
SENSITIVITY 1W/1m: 84.48 dB
FREE AIR RESONANCE：16.6 Hz
VOICE COIL DIAMETER：50 mm
FORCE FACTOR, BL：15.05 TM
MOVING MASS：134.66 g
X-max：13 mm
Vas：174.27 Ltr
Qts：0.390
Qms：4.201
Qes：0.430
Full specs: https://tdldiy.files.wordpress.com/2020/08/nht_drivers-2.xls
$30 each, $75 for all 3 plus shipping & PayPal
Happy listening,
Frank
I bought these several years ago with the idea I was going to make a speaker inspired by the famous TDL Reference. It turned out to be one of “those” projects, so these speakers have never been mounted. It turns out these are the holy grail in a transmission line:
https://tdldiy.files.wordpress.com/2012/08/tangband-mild-stuffing-graph.png
All specs from manufacturer data sheets:
DCR IMPEDANCE: 3.2 Ω
SENSITIVITY 1W/1m: 88 dB
FREE AIR RESONANCE：27 Hz
AIR GAP HEIGHT：8 mm
RATED POWER INPUT：250 W
FORCE FACTOR, BL：14.57 TM
MOVING MASS：134.66 g
X-max：12 mm
Vas：70.42 Litr
Qts：0.34
Qms：4.6
Qes：0.36
Full specs: https://tdldiy.files.wordpress.com/2020/08/tang-band-w8q-1071f.pdf
$60 each, $100/pr or $150 for all 4 plus shipping & PayPal
Foster NPT-11-083 10” Woofer (from NHT VT3)
These were from the famous NHT driver closeouts some years back. These have never been used, though they have been sitting up on the shelves for quite some time. I have 3 of these left. These are some of the best sealed cabinet designs around. From the high DCR, it’s clear it was meant to be used in pairs. Or perhaps all 3 in a balanced force arrangement?
DCR IMPEDANCE: 9.53 Ω
SENSITIVITY 1W/1m: 84.48 dB
FREE AIR RESONANCE：16.6 Hz
VOICE COIL DIAMETER：50 mm
FORCE FACTOR, BL：15.05 TM
MOVING MASS：134.66 g
X-max：13 mm
Vas：174.27 Ltr
Qts：0.390
Qms：4.201
Qes：0.430
Full specs: https://tdldiy.files.wordpress.com/2020/08/nht_drivers-2.xls
$30 each, $75 for all 3 plus shipping & PayPal
Happy listening,
Frank