Cheap Trick CT 228 a subwoofer for CT 225 or any other loudspeaker (2016: with new amplifier)

CT 228 aus K+T 1/2007
Technical data:
- size (HxWxD): 54.4 x 34.4 x 44.4 cm
- impedance: 4 Ohm
- sensitivity (2.83V/1m): 90 dB
- frequency range (-8dB): from 32 Hz
- speaker type: bass reflex
The CT 228 is a universal subwoofer that may e.g. be combined with the CT 225 satellites (see below).

Excerpt of the review by Klang+Ton:
... "For a change it was quite easy to find the right partners for this sub, after all the CT 228 was designed to harmonise with CT 225. But then, this sub may also be combined with other satellites. We placed the tiny squallers on the matching stands as in Klang+Ton 6/2006, put the sub in the centre and the show kicked off. The newly formed, inconspicuous trio immediately started to liven things up. The sound was crisp and full of attack, displaying lots of feeling for dynamics. The triumvirate didn't even try to hide its special liking to rock and pop, but put its back into it. Soft music was also entirely enjoyable, but you could tell that the set was attracted by a turned-up volume and music by long-haired characters wearing weird outfits. The bass of the CT 228, the main purpose of our test, impressed with a solid, crisp and dynamic performance and that not only with its designated partners. Compression is not part of the CT 228's vocabulary, for a bass of just 25 cm the performance is astonishing. Even low bass was not lacking. Only well-known tunes with extreme low bass exposed that nothing happened anymore below 35 Hz. The reserves of the speaker and the module benefited from the relief in this area, ensuring that despite two digit Watt values the output was almost inconceivably high. For standard music, however, the CT 228's low bass performance is more than adequate, securing that also bass drums and synth bass get their money's worth." ...
Our kit consists of:

- the Monacor SPH 250 TC bass driver, with voice coils in parallel.
- the subwoofer module Mivoc AM 80
- 4 Allen screws 5x30 mm
- 0.5 metre cable 2x2.5 mm2
- building instruction

Price for CT 228 Kit without cabinet per speaker: EUR 177,00 excl. VAT: € 148.74 / $ 174.03

Cheap Trick CT 228 with CT 225

CT 228 aus K+T 1/2007If you wish to combine the CT 228 with CT 225's we recommend to relieve the satellites of the bass.

Klang+Ton recommends to place a capacitor of 220 uF in the line to each satellite.

There are several ways to do this:

1) the cheap version, with a Mundorf 220 uF/63 V ELCO etched, per speaker EUR 2,29 excl. VAT: € 1.92 / $ 2.25

2) the high-grade version per speaker (all capacitors have to be in parallel):
a) 2 ELCO's 100 uF non-etched EUR 7,85 excl. VAT: € 6.60 / $ 7.72

The single capacitor (1) or the three capacitors in parallel (2) should be placed in the line to each CT 225 (e.g. the plus cable). They could, certainly, also be placed inside each speaker between binding post and crossover using the plus cable.

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