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SQ-50 Studio monitor
Reproduction so exact that we recommend SQ-50 both for high quality music listening at home, DVD movies in home cinema systems and close field test listening in recording studios. (A number of recoring engineers and professional musicians have already bought the original driver kits for the SQ-50´s.)
Yet, because you build it yourself, the cost is far from what you would expect from a loudspeaker of this quality.
to speaker driver kit (HSQ-50e).
Link to speaker drawings.
Customer response (=email from customers).
Questions? send your requests to firstname.lastname@example.org
features that add up making SQ-50 one of the best hifi speakers
The column shape is not just an attempt to make the cabinet elegant. It is also for practical reasons: The speaker drivers get higher than tables and chairs, avoiding midrange and treble from being damped by the furniture. The bass pipe is situated far from the drivers, and therefore does not emit a lot of midrange as it would, placed closer to the drivers. At the same time the floor space needed is not much more than an A4 (or Letter) sized piece of paper.
The side walls are slightly longer than the front and back, which makes the cabinet stand on its side walls. As they don´t vibrate vertically, almost no vibrations are transported down into the floor. Therefore the SQ-50´s can be put directly on a wooden floor without resonance problems. If you really want to remove every trace of vibration, just glue strings of felt or soft carpet under the side walls. Spikes are not needed.
The design makes the speaker fairly insensitive to placement. The distance from the back of the speaker to the wall should be at least 2 cm (0.8") or more. That´s all.
home cinema speakers
If you connect your SQ-50´s to your TV or video/DVD via a good amplifier, you will experience a really good cinema sound. Or to be more precise: A better sound than in many cinemas. Both deep bass and pure sound at the same time. (Many cinemas have loud and noisy bass, but the sound is rarely clean.)
When one wants to make a scene extra exciting, subbass pressure is not uncommon. Animated movies are no exceptions. For example: Finding Nemo, the scene with the mines and she submarine, or the trip with the turtles in the East Australian Stream – Don´t let small children watch those scenes alone with the SQ-50´s connected, the sound can be very intimidating.
Many of our customers use SQ-50´s in their home cinema systems, without needing any separate subbass speakers.
...is something you often read about in newsgroups where loudspeakers are discussed. This is how the need for this is described:
suspensions that hold the membrane in place (often a rubber surround
and a suspension made of coated fabric where the coil meets the
membrane) should be soft. The rubber surround is usually soft enough
from start. However, the fabric often seems to be too stiff in a new
driver. The coating binds some of the fibres in the coating together,
making it harder, and therefore this part may needs softening. From
start the sound can therefore be a little hash, and lacking the
deepest parts of the bass range.
However, the fabric will soften while the speaker is playing, the bass gets deeper and any harshness will dissappear.
As the amount of coating can differ som driver to driver, one speaker may even sound a little different from the other when it comes "out of the box". This will however even-out as the fibres of the fabric are loosened from each other.
The period of time this takes differs quite a lot. Some drivers need up to 100 hours or so before they are broken in.
The bass drivers in the HSQ-50 kit (the speaker kit for the SQ-50) only need about 10-20 hours at moderate listening level to get broken in.
To obtain maximum sound quality, don´t try to blow away the coating using maximum level at once. If the fabric is unevenly coated, full power at once may skew the coil and harm it. Take it easy the first hours, and you can enjoy the full quality of these gems for decades.
notice. The above comments on sound quality only apply using the
original speaker drivers. The SQ-50´s are RVH cabinets, requiring
drivers with exactly the right Thiele-Small parameters as well as
correct stiffness and interiour damping. Even small deviations can
ruin the sound quality.
With 50W input power the SQ-50 delivers 107 dB (at 1m) which can result in hearing damage within minutes.
Normal listening level for modern music (84 - 90 dB/1m) is obtained at about 0,25-1 W, and "party volume" (about 93-96dB/1m) at 2 - 4 W.
Recommended volume for music mixing in a recording studio is often 90 dB. Lower volume can make the recording engineer miss some details, higher volume will increase distortion in the ears, giving the same result.
The SQ-50 delivers 90 dB at 1 (one) W input power (distance 1m). So you really don´t need a gigantic amplifier.
If you are on a budget this means that you can choose a low power high sound quality amplifier instead of high power low quality one.
If possible, try to choose an amplifier where the power amplifier is made entirely from descrete components (not IC´s). IC power amps are usually designed like operational amplifiers, with low internal bandwidth, giving listening fatigue after a while.