Floorstanding Loudspeaker TBTL (Tang Band Transmission Line)   as in Hobby HiFi 4/2006

Standbox nach TBTL aus Hobby HiFi 3/2006
Technical data
Floorstanding Loudspeaker TBTL:

- impedance: 6 Ohm
- rated SPL (2.83V/1m): 90 dB
- size (HxWxD): 115 x 21 x 42 cm
- frequency range (-8dB): 32 - 40 000 Hz
- crossover frequencies: 150 and 3000 Hz
- speaker type: transmission line cabinet
The floorstanding TBTL (Tang Band Transmission Line) is a 3 way speaker with one Omnes Audio MT2.02 magnetostat, one Tang Band W4-657 B midrange driver and one Tang Band W69-1042 oval bass driver.

Verdict by Hobby HiFi: "These slim, but seen from the side rather massive loudspeakers were surprisingly uncritical with regard to placement: a distance of less than 50 cm from the rear wall was perfectly all right, a precise orientation towards the listener was not necessary. On the contrary: the inner side walls should just be visible from the listening position. Then the stage had the right width and depth. The tree-dimensional properties were quite close to considerably more expensive loudspeakers. Spatial sound sources that are within reach let the listener forget that relatively low-priced drivers were being used. Tonality tends to be on the balanced and rather unobtrusive side. Those who are not used to this type of sound or want to use these speakers in a heavily dampened room will find a different, high frequency boosting set-up on page 21. We cottoned up quickly to this honest and unflashy sound, since the reproduction showed a particular authenticity and was simply believable. Particularly worth mentioning is the low frequency performance. The bass sound is rather soft, typically transmission line, but exceptionally low. Compared to even top quality bass reflex speakers, the TBTL excels in attention to detail. There are details in abundance, and that's something that can be seldom found coming from bass reflex speakers. Cranking up the volume at the end of the listening session left the TBTL unmoved. Excessive levels were processed without batting an eyelid, meaning that this speaker plays really well even at higher volumes. Our 100 cubic metre listening room fill was pumped up by these slim, tall transmission line speakers with a sumptuous and rich sound, but without neglecting the attention to detail. The TBTL possesses all the characteristics required for large rooms."

Our kit consists of:


- Omnes Audio MT2.02 magnetostat
- Tang Band W4-657 B midrange driver
- Tang Band W69-1042 oval bass driver.
- 1.5 mats nap foam N30
- 1.5 bag polyester fleece
- self adhesive foam sealing tape
- 18 screws Pan 4 x 20 mm
- 4 metre cable 2x2.5 mm2
- terminal with gold plated brass binding posts
- building instruction

the crossover components to be mounted on wood:
- 10 mH i-core coil, large, < 0.6 Ohm
- 27 mH powder core coil, R = 4.9 Ohm (not 3.98 Ohm!)
- 1.5 mH air core coil 1.4 mm wire
- 10 mH powder core coil, R = 3.48 Ohm

Crossover components continued:
- 8.2 mH powder core coil, R = 2.27 Ohm
- 0.22 mH air core coil, 0.7 mm
- 0.27 mH air core coil, 0.7 mm
- 2 x 100 μF ELCO non-etched
- 270 μF ELCO etched (= 220 μF and 47 μF in parallel)
- 47 μF ELCO non-etched
- 6.8 μF ELCO non-etched
- 470 μF ELCO etched
- 3.3 μF MKP capacitor/400 V
- 5.6 μF MKP capacitor/400 V
- 33 μF ELCO non-etched
3.3 and 5.6 Ohm ceramic resistors, 10W
3.3 Ohm MOX4 resistor (orange-orange-gold)
8.2 Ohm MOX4 resistor (grey-red-gold)
6.8 Ohm ceramic resistor, 20W

Price per TBTL kit without cabinet
Price per unit - not available

Upon request a 220 x 155 mm universal PCB is available, where all components, except the large coils, can be mounted.
Price for PCB EUR 11,80 excl. VAT: € 9.92 / $ 11.80

High-end Version

our high-end version consists of (deviation from standard version in italic):

Our kit consists of:


- Omnes Audio MT2.02 magnetostat
- Tang Band W4-657 B midrange driver
- Tang Band W69-1042 oval bass driver.
- 1.5 mats nap foam N30
- 1.5 bag polyester fleece
- self adhesive foam sealing tape
- 18 screws Pan 4 x 20 mm
- 4 metre cable 2x2.5 mm2
- terminal with gold plated brass binding posts
- building instruction (without cabinet building instruction)

the crossover components to be mounted on wood:
- 10 mH DR56 coil, large, < 0.4 Ohm
- 27 mH powder core coil, R = 4.9 Ohm (not 3.98 Ohm!)
- 1.5 mH air core coil 1.4 mm baked varnish wire
- 10 mH powder core coil, R = 3.48 Ohm

Crossover components continued:
- 8.2 mH powder core coil, R = 2.27 Ohm
- 0.22 mH baked varnish air core coil, 0.9 mm
- 0.27 mH baked varnish air core coil, 0.9 mm
- 2 x 100 μF ELCO non-etched
- 270 μF ELCO etched (= 220 μF and 47 μF in parallel)
- 47 μF ELCO non-etched
- 6.8 μF ELCO non-etched
- 470 μF ELCO etched
- 3.3 μF Mundorf MKP capacitor/400 V
- plus a 0.1 μF tin foil capacitor in parallel
- 5.6 μF Mundorf MKP capacitor/400 V
- plus a 0.1 μF Mundorf Supreme capacitor in parallel
- 33 μF ELCO non-etched (no MKP, since not critical)
3.3 and 5.6 Ohm ceramic resistors, 10W
3.3 Ohm MOX4 resistor (orange-orange-gold)
8.2 Ohm MOX4 resistor (grey-red-gold)
6.8 Ohm ceramic resistor, 20W

Price for TBTL kit with high-end crossover, without cabinet
Price per unit - not available

Upon request a 220 x 155 mm universal PCB is available, where all components, except the large coils, can be mounted.
Price for PCB EUR 11,80 excl. VAT: € 9.92 / $ 11.80

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