Harwood Monitor 18 - as shelf or floorstanding speaker as in Hobby Hifi 6/2007

Technical data of the shelf speaker:
- size (HxWxD): 34.6 x 19.6 x 27 cm
- impedance: 6 Ohm
- crossover frequency: 3 kHz
- sensitivity: 84.5 dB (2.83V/1m)
- frequency range (-3dB): 52-33000Hz
- speaker type: sealed cabinet with serial capacitor.

Technical data of the floorstander:
- size (HxWxD): 100.3 x 19.6 x 27 cm
- impedance: 6 Ohm
- crossover frequency: 3 kHz
- sensitivity: 85.5 dB (2.83V/1m)
- frequency range(-3dB): 35-33000Hz
- speaker type: bass reflex

For the 25th anniversary of Hifi sound Bernd Timmermanns designed a couple of monitor speakers, both equipped with the Harwood UR 2.0 ribbon tweeter and the Harwood 18 WXP Cone bass drivers.

There are two versions, a floorstander and a shelf speaker:
- the Harwood Monitor 18 XL, a bass reflex floorstander
- the Harwood Monitor 18, a shelf speaker

The shelf speaker was designed as a sealed cabinet - high pass filter, fitted with a capacitor in series to the bass driver to enhance bass.

The floorstander was equipped with a Helmholtz Absorber for suppressing cabinet resonance.Harwood Monitor 18

Excerpt of the review in Hobby Hifi 6/2007

... "The exceptionally slim shelf speaker compensates for the lack of low bass with an outstandingly precise bass. The XL Monitor, on the other hand scores with a brilliant low bass volume. Mid and high frequencies of both monitors are alike as two peas in a pod. Recordings without significant bass really sound the same using both speakers. Impressive, above all, is the naturalness of vocals and their three dimensional representation. There is a certain tendency towards bass: the extreme like close range with many d'Appolito designs is not noticeable. The sound stage is rather deep, but that doesn't mean that there is no staggering – on the contrary: the staggering of vocals and instruments is excellent and in general, there is an magnificent easiness and airiness noticeable. And nothing changes, even at higher volumes: not least due to the relative high crossover frequency (3000 Hz compared to the 2000 Hz of the Monitor 17), monitor 18 and 18 XL show a considerable power handling. At the limit the small Monitor 18 is even one step ahead. The electrical high pass filter suppresses the lowest frequencies that just cause unwanted bass diaphragm excursion of the floorstander."

Our kit contains

the shelf speaker
- the Harwood ribbon tweeter UR 2.0
- the Harwood bass driver 18 WXP Cone
- 1 bag (=2 mats) polyester fleece
 
- self adhesive sealing tape
- 10 Pan screws 4x20 black
- 2 binding posts
- 1.5 m loudspeaker cable 2x2.5 mm2
- the building instruction 		the floorstander
- the Harwood ribbon tweeter UR 2.0
- the Harwood bass driver 18 WXP Cone
- 2 1/2 bag (=5 mats) polyester fleece
- 2x HP 70
- self adhesive sealing tape
- 10 Pan screws 4x20 black
- 2 binding posts
- 2.5 m loudspeaker cable 2x2.5 mm2
- the building instruction
and the crossover components to be mounted on a wooden board:
- 1.5 mH air core coil / 1.4 mm
- 0.47 mH air core coil / 0.7 mm
- 1.0 mH air core coil / 0.7 mm
- 560 μF ELCO, etched
- 10 μF ELCO, non etched
- 4.7 μF MKP capacitor
- 10 μF ELCO, non etched
- 10 Ohm MOX10 resistor (brown black black)
- 4.7 Ohm MOX10 resistor (yellow purple gold)
- 4.7 Ohm MOX4 resistor (yellow purple gold)
- 1.5 Ohm MOX4 resistor (brown green gold) 		- 1.2 mH air core coil / 1.4 mm
- 0.47 mH air core coil / 0.7 mm
- 1.0 mH air core coil / 0.7 mm
 
- 15 μF ELCO, non etched
- 4.7 μF MKP capacitor
- 10 μF ELCO, non etched
- 3.9 Ohm MOX10 resistor (orange white gold)
- 4.7 Ohm MOX10 resistor (yellow purple gold)
- 4.7 Ohm MOX4 resistor (yellow purple gold)
- 1.5 Ohm MOX4 resistor (brown green gold)

Kit price per shelf speaker without wood:
- not available

Kit price per floorstander without wood:
- not available

Please note:
If you prefer to mount the crossover components on a universal PCB instead on wood, we recommend a 140 x 102 universal PCB. Two PCB's per speaker are needed.

Price for PCB RA 140 (str-RA140): EUR 4,20 excl. VAT: € 3.53 / $ 3.71

Harwood Monitor 18, High End

If you wish to use top quality components then our high end version will be the right choice for you. The kit contains:
- a lining with self adhesive Damping 10 for the panels (but a little less polyester fleece)
- and the crossover components listed below for mounting on a wooden board:
- 1.5 mH cfc foil coil (<0.5 Ohm)
- 0.47 mH baked varnish air core coil / 0.7 mm
- 1.0 mH baked varnish air core coil / 0.7 mm
- 560 μF ELCO, etched + 10 μF MKP parallel
- 10 μF ELCO, non etched
- 4.7 μF Clarity CAP ESA capacitor
- 10 μF MKP capacitor
- 10 Ohm MOX10 resistor (brown black black)
- 4.7 Ohm MOX10 resistor (yellow purple gold)
- 4.7 Ohm MOX4 resistor (yellow purple gold)
- 1.5 Ohm MOX4 resistor (brown green gold) 		- 1.2 mH cfc foil coil (<0.5 Ohm)
- 0.47 mH baked varnish air core coil / 0.7 mm
- 1.0 mH baked varnish air core coil / 0.7 mm
 
- 15 μF ELCO, non etched
- 4.7 μF Clarity CAP ESA capacitor
- 10 μF MKP capacitor
- 3.9 Ohm MOX10 resistor (orange white gold)
- 4.7 Ohm MOX10 resistor (yellow purple gold)
- 4.7 Ohm MOX4 resistor (yellow purple gold)
- 1.5 Ohm MOX4 resistor (brown green gold)

Kit price per shelf speaker without wood:
- not available

Kit price per floorstander without wood:
- not available

Please note:
If you prefer to mount the crossover components on a universal PCB instead on wood, we recommend a 140 x 102 universal PCB. Two PCB's per speaker are needed.

Price for PCB RA 140 (str-RA140): EUR 4,20 excl. VAT: € 3.53 / $ 3.71

Impedance correction

If you want to use this speaker with a valve amp you'll need a impedance correction consisting of three components: 33 μF ELCO non etched, 0.33 mH air core coil and 6.8 Ohm resistor, 20 Watt: The high end version also employs standard components since high end components won't improve the sound (nevertheless, high end components for the impedance correction are available upon request).

Price per impedance correction: - not available

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