Bass only when I stand up…

 

mijostyn

plant caddies can work for your method of finding placement

https://www.homedepot.com/b/Wood/N-5yc1vZ1z0vir2/Ntk-elasticplus/Ntt-plant+caddy?Ntx=mode+matchpartialmax&NCNI-5&visNavSearch=plant%20caddy

a front block to angle them vertically is needed to alter the angles of directivity and reflections off all surfaces

a single/stack of long paint mixers can find the right height, then something nicer looking, secured.

https://www.homedepot.com/p/21-in-Wood-Paint-Stick-for-5-Gallon-3-Pack-PS5G-3/206871624

I would not use the spikes, I’ve used them, no advantage heard, they are limiting, prevents easy alternate toe-in when a friend visits, I gave them to my friend, he used them, then not. His imaging wonderful when in center, gone when sitting off center without altering toe-in. Magnificent system, superior imaging, years of acquisitions/expenditures, just strong left when left of center, ... SUCKS.

Mine, original toe in, sitting off center: ok/better than many due to horns with wide horizontal dispersion, narrow vertical dispersion, BUT not great, so much better when aimed at each listening position.

I guess if you don’t have friends over often and you believe in spikes ....

After you find a location and vertical angle, compare with/without spikes. IF you don’t hear a difference, forget what ’should be better’. Ability to move/alter toe-in/maintain wide imaging when desired is far more important

Those are some serious speakers, producing a lot of bass. The manual has advice regarding placement

https://www.pmc-speakers.com/sites/default/files/attachments/web-Se%20Series-manual-July2022_0.pdf

I would:

1. make the 128 lb monsters movable

a. remove the spikes

b. I would prefer 3 wheels, two front, 1 rear center. dual wheel furniture casters have tight axels that do not wobble. 3 is more weight/wheel than 4; and 3 always settle without wobble wherever you put them.

c. OR add soft or hard ’skid’ plates to the bottom of the frame where the spikes used to be. felt pads on a hard floor, smooth plastic on carpet. move with force, stay put.

Now you have the ability to move them various distances from rear and side walls, until things improve. In current and any future space.

Doubt about movement/stability? See my system, my speakers on 3 wheels with Donna’s precious things on top of the angled enclosures. They move, they don’t move, nothing vibrates off the top. It’s about the correct ’tight’ wheels/amount of felt/amount of plastic (minimum material relative to speaker weight to allow movement)

9th photo shows bottom of speaker: (click FULL SCREEN top right, to see entire image/bottom of speaker/captions)

https://www.audiogon.com/systems/9511

flat 2x4 block on top of front wheels creates vertical angle when upright; 3 wheels (came on JSE Infinite Slope Model 2s. I tried ’superior’ wheels, all had wobbly axels, these dual wheel type are the best, no wobble when in position, with those 37lb 15" woofers doing their thing. Over 100lbs, they stay where I move them.

2. Alternate Toe-In

a. 1 listener: angle so each speaker is aimed directly at the listening position

b. 2 listeners, presumably a small chair in between, or ends of a sofa:

leave inside front corner where it is, rotate so that left speaker is aimed directly at right listener, aim right speaker directly at left listener. Imaging is ’maintained’ to a decent degree because each listener gets more volume from the opposite side due to directivity, as well as somewhat equal volume from speaker his side due to closer distance. It works, fiddle with it.

3. Angle the Speakers Vertically

so that they project the sound UP slightly. Ideally tweeter aimed directly at seated ear height. The combination of angled toe-in and angled vertically alters the direction and reflection of sound waves to and from floor/ceiling/side/rear walls.

In your case, anti-tipping solution(s) need to be solved.

4. Now, measuring tools to help find best location:

a. Sound Pressure Meter

https://www.amazon.com/BAFX-Products-Pressure-30-130dBA-Warranty/dp/B00ECCZWWI/ref=sr_1_4?crid=XHO5MM8W5I8V&keywords=sound%2Bpressure%2Blevel%2Bmeter&qid=1683981123&sprefix=sound%2Bpressure%2Caps%2C85&sr=8-4&th=1

On a tripod, at listening position, seated ear height

b. Test Tones to Measure (CD, not LP)

I use tracks 9-38 of this CD

https://www.discogs.com/release/7290000-Various-Amazing-Bytes

Single 1/3 octave tones, select;play/pause/....... not pink noise, single tones: make a chart, record what you are getting at your initial placement. Make copies, see what changes when moved .....? Take your time, take a break, back at it tomorrow .... Takes careful work, but you will save yourself the trouble/money/ugliness of a lot od room treatment. Perhaps some needed, but less for sure.

Live anywhere near me, Plainfield, NJ. It would be fun to help and hear those puppies!

Holy Crap, You or someone should snap this up

https://www.ebay.com/itm/155530941889?hash=item24365dd5c1:g:kWYAAOSwtShkANw1&amdata=enc%3AAQAIAAAAwPbtLhlkOntoy%2F9Xni9%2FPOh0VRnh4sxCq%2FQn3RRXGRwLWSnL1gsKWs2axYxzPpMxcnRdotR54y70Rle46wlxG9sejjeO3WSSm8Bb96OrP0TNDF9NvEmDQqI2cdhoAg52FzL656NveKorpqvNaNhz3%2F2WnH%2F%2FmbtTfxwt38vBjaXLiohTgO0DQjCydx4ykX%2BJMJI9LwL0k9wkjr6ht%2Fvq0VUIGwqwHB6KFjZhpP%2FD5eGirsusOJIs1SGNvQyv1teCcQ%3D%3D%7Ctkp%3ABk9SR_qK0deCYg

If anyone's bidding. let me know so I don't bid against you. Nobody:  I'll buy it for a friend if still available at decent price