HARBETH Mastering Monitor20
¥ 103,950 (tax included, 1 unit, around 2006)
Commentary
LS3/5a replacement monitor speaker developed for BBC grade 2 voice monitor (monitor for checking narration, etc.).
The HLP3ES-2 and the enclosure have the same configuration from the tuning method to the driver unit used and the crossover network.
11 cm polypropylene cone type woofer with 25 mm aluminum boss coil is mounted in the low range.
Smooth piston motion is obtained by the edge using low-loss material.
A 19 mm aluminum hard dome type tweeter is installed in the high range.
By applying magnetic oil, it has undergone ferrofluid cooling treatment to obtain stable regeneration ability even at high temperature, and by using synthetic resin on the edge, more accurate reproducibility is obtained.
The woofer unit is located slightly behind the tweeter to optimize the phase characteristics and on-axis power response near the crossover point.
The network circuit was designed based on the LS3/5a technique, and sound was elaborated by repeating trial listening with emphasis on reproducibility of human voice.
The enclosure has been designed with a lot of time spent dumping wood and tuning response. We have adopted an original enclosure design "SuperTunedStructure" that thoroughly studied sound behavior in a closed enclosure based on computer analysis.
We have also adopted a round baffle to reduce acoustic wave analysis at the baffle end, and SuperGrille's method to optimize acoustic wave propagation by embedding a jersey grill in the front baffle.
The enclosure is finished with a grey-textured, feathered finish.
The input terminal uses a gold plated banana plug type as a special specification instead of the original spicon socket specification.
Model Rating
| Method | 2-Way, 2-Speaker, Sealed Type, Bookshelf Type, Anti-magnetic Type |
| Units Used | For low band : 11 cm cone type For high-pass : 1.9 cm dome type |
| Playback frequency band | 75 Hz to 20 kHz ± 3 db |
| Crossover frequency | 3.2kHz(18dB/oct) |
| Output sound pressure level | 83dB/W/m |
| Impedance | 6 Ω |
| Max Input | 50W (program) |
| Recommended amplifier input | 25W ~ 120W |
| External dimensions | Width 188x Height 305x Depth 198 mm |
| Weight | 5.9kg |