From: Eric Roth < Sent: Tuesday, August 28, 2018 5:48 PM To: Jeffrey E.; Jay Massar Subject: RE: G550 sn 5173 SUBWOOFER PLACEMENT There is already a subwoofer in the aft section of the divan and there is enough volume of air within the total cavity. These subs are designed for Gulfstream to require minimal air movement as many of the subs are located under the seat base with approx. less than 2 cubic feet of volume. Best Regards, Eric ERIC H. ROTH I PRESIDENT C <maiIto: > I www.intljet.com <http://www.intljet.com/> <http://twitter.comMI/intljet> <http://www.facebook.com/intljet> 2221 Smithtown Avenue, Long Island MacArthur Airport, Ronkonkoma, New York 11779 From: jeffrey E. [mailto:[email protected] Sent: Tuesday, August 28, 2018 1:44 PM To: Eric Roth <->; Jay Massar < Subject: Re: G550 sn 5173 SUBWOOFER PLACEMENT EFTA_R1_01840865 EFTA02626777

it appears to project under the bed. you need air movement On Tue, Aug 28, 2018 at 1:37 PM, Eric Roth < Jeffrey, <mailto: » wrote: We were in the aircraft this morning looking for "space" opportunities for the sub woofer. I was hoping that we had space underneath the L/H #2 seat, but this is already occupied. My suggestion- you have a subwoofer as part of this system design and it needs to go back for optimum performance. We only see two opportunities and they are both in the fwd arm rest of the L/H divan: 1. Fwd side (we would need to create a speaker grill to allow acoustic penetration) 2. Aft side (see attached engineering drawing) where it is "visually concealed". Since low octave frequencies are non —directional ( it is not nice to roll your eyes at me ), I advise installing as drawing. Please provide direction so that we can move forward. Best Regards, Eric 2 EFTA_R1_01840866 EFTA02626778

ERIC H. ROTH I PRESIDENT I C -<mailto: :-> I www.intljet.com <http://www.intljet.com/> <http://twitter.com/#!/intljet> <http://www.facebook.com/intljet> 2221 Smithtown Avenue, Long Island chttps://maps.google.comfiq=2221+Smithtown+Avenue,+Long+Island&entry=gmail&source=g> MacArthur Airport, Ronkonkoma, New York 11779 From: Maurice Blibaum Sent: Tuesday, August 28, 2018 1:21 PM To: Eric Roth < <mailto: Subject: G550 sn 5173 JEFFERY SUBWOOFER PLACEMENT > > I don't have a divan frame as in Jeffery's AC. This should give an idea though of what's going on. MAURICE BLIBAUM I STRUCTURAL DESIGNER <http://www.intljet.comh I F <mailto > I www.intljet.com <http://www.intljet.com/> <http://www.facebook.com/intljet> <http://www.twitter.com/intljet> 2221 Smithtown Avenue, Long Island <https://maps.google.com/?q=2221+Smithtown+Avenue,+Long+Island&entry=gmail&source=g> MacArthur Airport, Ronkonkoma, New York 11779 3 EFTA_R1_01840867 EFTA02626779

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